This is a pretty nice hub for a 47x47, however my suggestions are that:
1. you should try to add a bit more round into your build
2. Maybe don't place trees in the middle and replace it by fountains or something like that. The fact is that the trees are so big compared to the hub itself. It doesn't feel natural. However, that is my opinion, if you want to take it or not is your choice.
3. For the mountain, you should possibly make custom trees like you made in the middle, it would look better and more professional.
4. Include a few more blocks in the wall, it'll look good with variety!
5. Last but not least, maybe add small hills if you disprefer the fountain idea
I hope you take in consideration my suggestions!
